CN112296374A

CN112296374A - Lathe fixture for automatic centering of brake drum

Info

Publication number: CN112296374A
Application number: CN202011230531.1A
Authority: CN
Inventors: 赵效明; 吴晓敏; 刘波; 韩东里; 詹文强
Original assignee: Longgong Fujian Casting and Forging Co Ltd
Current assignee: Longgong Fujian Casting and Forging Co Ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-02-02
Anticipated expiration: 2040-11-06
Also published as: CN112296374B

Abstract

The invention discloses a lathe fixture for automatically centering a brake drum, which comprises a fixture base station and the brake drum, wherein a plurality of clamping jaw seats are annularly distributed on the upper surface of the fixture base station and positioned on the outer side of the brake drum, the top end of each clamping jaw seat is fixedly embedded with a clamping jaw body through a pin shaft, the upper side and the lower side of each of the two ends of each clamping jaw body are fixedly embedded with a clamping block, a movable cavity is formed in each clamping jaw body and positioned on one side of each clamping block, and a connecting plate is movably connected in each movable cavity. According to the invention, the two bolt holes which can be overlapped with each other are formed in the opposite ends of the two clamping blocks, and then the two clamping blocks are fixed at one end of the clamping jaw body through the bolts and the bolt holes, so that the bolts are easier to disassemble and assemble relative to the pin shaft, and meanwhile, the connection stability of the clamping blocks in the clamping jaw body can be improved through the mutual clamping between the plurality of limiting shafts and the plurality of limiting holes.

Description

Lathe fixture for automatic centering of brake drum

Technical Field

The invention relates to the technical field of brake drum processing, in particular to a lathe fixture for automatic centering of a brake drum.

Background

Traditional auto-centering of brake drum is used's the tight piece of clamp of lathe clamp easily wears out, needs the periodic replacement, and traditional tight piece of clamp is fixed in knocking into the jack catch body through the round pin axle, and such fixed mode makes the tight piece of clamp connect firmly, but also has the problem of difficult dismantlement change.

Disclosure of Invention

Objects of the invention

In order to solve the technical problems in the background art, the invention provides a lathe fixture for automatically centering a brake drum.

(II) technical scheme

The invention provides a lathe fixture for automatically centering a brake drum, which comprises a fixture base table and the brake drum, wherein a plurality of clamping jaw seats are annularly distributed on the upper surface of the fixture base table and positioned on the outer side of the brake drum, the top end of each clamping jaw seat is fixedly embedded with a clamping jaw body through a pin shaft, the upper side and the lower side of each of the two ends of each clamping jaw body are fixedly embedded with a clamping block, a movable cavity is formed in each clamping jaw body and positioned on one side of each clamping block, a connecting plate is movably connected in each movable cavity, a plurality of limiting shafts are fixedly connected to the surface of one side, facing the clamping blocks, of each connecting plate, and a plurality of limiting holes capable of being clamped with the end parts of the limiting shafts are formed in the outer surface, facing the connecting plate, of each clamping block.

Preferably, the outer surface of the connecting plate, which is far away from the clamping block, is rotatably connected with a screw shaft, and the screw shaft is screwed with the inner wall of the jaw body.

Preferably, a connecting column is slidably sleeved at one end, far away from the connecting plate, of the screw shaft, a pull column is fixedly connected at one end, far away from the screw shaft, of the connecting column, and a retraction groove for accommodating the pull column is formed in the outer surface of the clamping jaw body.

Preferably, the outer surface of one end of the pull column close to the connecting column is fixedly sleeved with a spline ring sleeve, and the inner surface of one end of the retraction groove close to the connecting column is fixedly connected with a latch capable of being clamped with an edge tooth socket of the spline ring sleeve.

Preferably, the outer surface of the connecting column is symmetrically and fixedly connected with a pair of rectangular positioning sliding blocks, and the inner wall of the end part of the screw shaft is provided with a rectangular positioning sliding groove matched with the rectangular positioning sliding blocks.

Compared with the prior art, the invention has the beneficial effects that: according to the invention, the two bolt holes which can be overlapped with each other are formed in the opposite ends of the two clamping blocks, and then the two clamping blocks are fixed at one end of the clamping jaw body through the bolts and the bolt holes, so that the bolts are easier to disassemble and assemble relative to the pin shaft, and meanwhile, the connection stability of the clamping blocks in the clamping jaw body can be improved through the mutual clamping between the plurality of limiting shafts and the plurality of limiting holes.

Drawings

Fig. 1 is a schematic top view of a lathe fixture for automatically centering a brake drum according to the present invention;

FIG. 2 is a front view schematic structural diagram of the jaw seat, the jaw body and the clamping block of the present invention;

FIG. 3 is a side view of the jaw body and clamping block of FIG. 2 in cross-section in the assembled configuration;

fig. 4 is an enlarged view of the invention at a in fig. 3.

In the figure: the clamp comprises a clamp base table 1, a clamp base table 2, a clamp base table 3, a clamp body 4, a clamp block 5, a brake drum 6, a movable cavity 7, a connecting plate 8, a limiting shaft 9, a limiting hole 9, a connecting column 10, a pull column 11, a spline ring sleeve 12, a latch 13, a rectangular positioning sliding block 14, a rectangular positioning sliding groove 15, a retraction groove 16 and a screw shaft 17.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

As shown in fig. 1-4, the lathe fixture for automatically centering a brake drum provided by the invention comprises a fixture base 1 and a brake drum 5, wherein a plurality of jaw seats 2 are annularly distributed on the upper surface of the fixture base 1 and positioned on the outer side of the brake drum 5, a jaw body 3 is fixedly embedded at the top end of each jaw seat 2 through a pin shaft, a clamping block 4 is fixedly embedded on the upper side and the lower side of each of the two ends of each jaw body 3, a movable cavity 6 is formed in the jaw body 3 and positioned on one side of the clamping block 4, a connecting plate 7 is movably connected in the movable cavity 6, a plurality of limiting shafts 8 are fixedly connected on the surface of one side, facing the clamping block 4, of the connecting plate 4, and a plurality of limiting holes 9 capable of being clamped with the end portions of the limiting shafts 8 are formed in the outer surface, facing the connecting plate 7, of the clamping block 4.

In an alternative embodiment, a screw shaft 17 is rotatably connected to the outer surface of the connecting plate 7 away from the clamping block 4, and the screw shaft 17 is screwed with the inner wall of the jaw body 3.

In an optional embodiment, the connecting column 10 is slidably clamped and sleeved at one end of the screw shaft 17 far away from the connecting plate 7, the pull column 11 is fixedly connected at one end of the connecting column 10 far away from the screw shaft 17, and the outer surface of the jaw body 3 is provided with a retraction groove 16 for accommodating the pull column 11.

In an alternative embodiment, a spline ring 12 is fixedly sleeved on the outer surface of one end of the pull post 11 close to the connecting post 10, and a latch 13 capable of being engaged with the edge tooth socket of the spline ring 12 is fixedly connected on the inner surface of one end of the retraction groove 16 close to the connecting post 10.

In an alternative embodiment, a pair of rectangular positioning sliders 14 is symmetrically and fixedly connected to the outer surface of the connecting column 10, and a rectangular positioning sliding groove 15 matched with the rectangular positioning slider 14 is formed in the inner wall of the end portion of the screw shaft 17.

The working principle is as follows: the clamping blocks of the traditional lathe fixture for automatically centering the brake drum are easy to wear and need to be replaced regularly, the traditional clamping blocks are fixed in the jaw body through pin shafts, the clamping blocks are connected stably in such a fixing mode, but the clamping blocks are not easy to detach and replace, in the embodiment, two bolt holes which can be coincided with each other are formed in opposite ends of the two clamping blocks 4, then the two clamping blocks 4 are fixed at one end of the jaw body 3 through the bolts and the bolt holes, the bolts are easier to detach and install relative to the pin shafts, and meanwhile, the connection stability of the clamping blocks 4 in the jaw body 3 can be improved through mutual clamping between the limiting shafts 8 and the limiting holes 9; specifically, as shown in fig. 3, two clamping blocks 4 are simultaneously embedded into the jaw body 3, opposite ends of the two clamping blocks 4 are sleeved inside and outside, then a bolt is screwed in from the end of the jaw body 3, and the bolt is spirally connected with a bolt hole overlapped with the two clamping blocks 4, so that the two clamping blocks 4 are fixed at one end of the jaw body 3; then the pull post 11 is drawn out from the retraction groove 16 to separate the spline ring sleeve 12 from the latch 13, then the pull post 11 is rotated, the pull post 11 drives the connecting post 10 to rotate, the screw shaft 17 is driven to rotate through the sliding block between the rectangular positioning slide block 14 and the rectangular positioning slide groove 15, the screw shaft 17 is driven to horizontally move through the threaded screwing between the screw shaft 17 and the inner wall of the jaw body 3, so that the connecting plate 7 is driven to horizontally move, and the limiting shaft 8 is driven to be clamped into the limiting hole 9 to limit the clamping block 4 or to be separated from the limiting hole 9 to relieve the limit.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A lathe fixture for automatically centering a brake drum comprises a fixture base table (1) and the brake drum (5), it is characterized in that a plurality of claw seats (2) are annularly distributed on the upper surface of the clamp base station (1) and positioned on the outer side of the brake drum (5), the top end of each claw seat (2) is fixedly embedded with a claw body (3) through a pin shaft, the upper side and the lower side of the two ends of the clamping jaw body (3) are fixedly embedded with a clamping block (4), a movable cavity (6) is arranged inside the jaw body (3) and on one side of the clamping block (4), the interior of the movable cavity (6) is movably connected with a connecting plate (7), the surface of one side of the connecting plate (7) facing the clamping block (4) is fixedly connected with a plurality of limiting shafts (8), the outer surface of the clamping block (4) facing the connecting plate (7) is provided with a plurality of limiting holes (9) which can be clamped with the end part of the limiting shaft (8).

2. The lathe fixture for automatically centering the brake drum as claimed in claim 1, wherein a screw shaft (17) is rotatably connected to the outer surface of the connecting plate (7) away from the clamping block (4), and the screw shaft (17) is screwed with the inner wall of the jaw body (3).

3. The lathe fixture for automatically centering the brake drum as claimed in claim 2, wherein a connecting column (10) is slidably and fittingly sleeved on one end of the threaded shaft (17) far away from the connecting plate (7), a pull column (11) is fixedly connected to one end of the connecting column (10) far away from the threaded shaft (17), and a receiving groove (16) for receiving the pull column (11) is formed in the outer surface of the pawl body (3).

4. A lathe fixture for automatically centering a brake drum as claimed in claim 3, wherein a spline ring (12) is fixedly sleeved on an outer surface of one end of the pull stud (11) adjacent to the connecting stud (10), and a latch (13) capable of engaging with an edge tooth groove of the spline ring (12) is fixedly connected on an inner surface of one end of the retraction groove (16) adjacent to the connecting stud (10).

5. The lathe fixture for automatically centering the brake drum as claimed in claim 3, wherein a pair of rectangular positioning sliders (14) are symmetrically and fixedly connected to the outer surface of the connecting column (10), and a rectangular positioning sliding groove (15) matched with the rectangular positioning slider (14) is formed in the inner wall of the end portion of the screw shaft (17).